Failbetter Games' dark nautical RPG, Sunless Sea, is getting an expansion. Titled Zubmariner, the expansion takes a look at things beneath the waves of the Unterzee. The expansion does not yet have a release date.

Zubmariner will offer a number of new story locations and ports — for example the underwater city of Wrack, home to several shipwrecks, and the Thalatte, a mysterious collection of organs, complete with a large, sucking orifice. Failbetter Games also offered some early screenshots of things players might find on the seabed, such as bio-luminescent beasts, shipwrecks, glowing coral, and thermal vents.